Zinc stearate

Zinc stearate
Zinc stearate
General
Other names	zinc distearate
Molecular formula	Zn(C15H35O2)2
Molar mass	632.2 g/mol
Appearance	soft, white powder
CAS number	[557-05-1]
Properties
Density and phase	1.095 g/cm³, solid
Solubility in water	insoluble
Solubility in alcohol	insoluble
Solubility in ether	insoluble
Solubility in benzene	slightly soluble
Melting point	120-130°C
Boiling point	decomposes
Flash point	277°C
Autoignition temperature	420°C
Hazards
EU classification	not listed
NFPA 704	1 0 0
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Zinc stearate (Zn(C₁₈H₃₅O₂)₂) is a chemical compound. Zinc stearate is a zinc soap that repels water. It is insoluble in polar solvents such as alcohol and ether but soluble in aromatic hydrocarbons eg benzene and chlorinated hydrocarbons when heated. It is the most powerful mold release agent among all metal soaps. It contains no electrolyte and has a hydrophobic effect. Its main application areas are the plastics and rubber industry where it is used as a releasing agent and lubricant which can be easily incorporated.

Applications

• As a synergic stabilizer for Ba/Cd and Pb stabilizer systems.
• As a gloss imparting agent in paint industry.
• As a metal release agent in rubber, polyurethane and polyester processing system.
• As a die release agent in Powder metallurgy.
• As a chief ingredient in "fanning powder", used by magicians performing card manipulation to decrease the friction between the cards.

External links

de:Zinkstearat